An agency agreement is a legal contract creating a fiduciary relationship whereby the first party ("the principal") agrees that the actions of a second party ("the agent") binds the principal to later agreements made by the agent as if the principal had himself personally made the later agreements. The power of the agent to bind the principal is usually legally referred to as authority. Agency created via an agreement may be a form of implied authority, such as when a person gives their credit card to a close relative, the cardholder may be required to pay for purchases made by the relative with their credit card.